Am 23.02.2012 19:20, schrieb Simon Taylor:
I'm planning on keeping the abstraction very low level - just wrap some memory as a surface, and not support concurrent BeAPI drawing access. There will be some investigation required as to the quickest way to get those surfaces into the app_server, but hopefully if there is any work required there it could be shared between Cairo and Skia and any other client-side rendering libraries.
This is definitely the way to go. Just initialize a Cairo surface with the memory pointer and bytes per row information of a BBitmap and you have attached Cairo to a block of memory. Then the default software renderer included with Cairo should provide a feature complete rendering backend. I had once done this work and provided a patch, memory is failing me. It may be attached to a HaikuPorts ticket, or maybe I have only sent it to the HaikuPorts mailing list. I did the changes in the code, but then failed getting the build system of Cairo to compile and run the tests. I just couldn't figure out how to link in the C++ libs since Cairo is C-only... So I have no idea if what I coded actually works.
Best regards, -Stephan
